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Rock River Arms

RRA 9mm Forged A4 Upper Receiver Assembly

RRA AR9mm upper receiver

This is a quality and traditional 9mm upper! It's just like Colt's. Also fit and finish are excellent. I like and prefer the ejection port's half door and large shell case deflector.

5

Great Upper

Posted by Jerry on 7th Mar 2016

This upper has a really nice fit and finish. I like the way a dedicated 9mm upper looks opposed to a standard AR upper with a shell deflector and FA. Can't go wrong with with Rock River.

5

100%

Posted by Unknown on 14th Oct 2015

Great upper

5

Traditional 9mm upper

Posted by Unknown on 23rd Jul 2015

I wanted a traditional dedicated receiver to improve my kit gun
The 9mm deflector won't fit inside a plastic vise block so I had to use wood blocks to hold it top and bottom.
I like the ejection pattern now and the RRA is good looking.
Fast delivery from 9mmAR

4

Works well, seems durable.

Posted by G on 10th Apr 2015

I really wanted a dedicated 9mm upper for my build; The smaller door and larger gas/shell deflector work well to keep the gas away from your face.

We'll see if it withstands the test of time, but for now I'm very happy.

-1 star for not working with a gasbuster handle.

5

9mm upper

Posted by Unknown on 7th Apr 2015

Having looked at several other 9mm uppers, I felt the RRA was best suited. It mates good and is at a good price.

4

Usual good product from RRA ,but.....

Posted by Richard Smith on 16th Jul 2014

As usual, RRA has a quality product, the only issue I have with this product is the finishand fit with the CMMG lower I'm using on this build. The finish seems to be subpar by standards of other manufactures(and I have built to many AR's using just about everyone) and the fit to the lower leaves a little more wiggle room than I prefer. I know I usually get a better fit with matched sets, but I have attached this CMMG lower I'm using to Anderson, Yankee Hill, and even my neighbors Bushmaster and the fit is better than with this RRA. Now don't get me wrong, its acceptable by a long shot, just not where I like it. All in all, I give it a 4 of 5 stars, because it is still a quality product and a good price.